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Service bulletin AR831

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10110856
Published by NHTSA2017-08-10
Manufacturer's numberAR831
Manufacturer's date2017-02-06
NHTSA componentSTRUCTURE; STRUCTURE:FRAME AND MEMBERS

NHTSA's summary

Front Pivot Mount Reinforcement-Complaint-Pivot Mounts 1306500-18 (RS) and 1306500-19 (CS)= bolts coming loose/shearing causing bracket failure. Cause-Inferior bracket support leading to bolt shearing and pivot mount movement. Correction-Add gussets and welding per instruction. Vehicles Affected-Units built with the front pivot mount bolted to the ARBOC frame without welding (SOM only between SO# 2202 and 2736)

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Body and frame

Vehicles listed
ARBOC SPIRIT OF MOBILITY2015, 2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
AR8602018-09-17. Service bulletin. AR860-Front Pivot Mount Inspection and Repair. Complaint-Pivot mount bolts having repeated premature failure. Cause-Spring pivot bolt movement allowed by elongated mounting hole. Correction-Inspect/replace bolt. Labor allowance 2 hours per unit. Vehicles affected-Units that have completed AR831 and built with the front pivot mount bolted to the ARBOC frame without welding. (Buses between SO# 2202 and 2736)
AR8392017-08-25. Service bulletin. AR839-Upper Shock/Track Bar Mount Replacement. Complaint-Cracking at upper shock and track bar mounts on chassis frame. Cause-Concentrated stress loads. Correction- Drill 1/8" stop holes into frame at the end of the cracks and weld provided retrofit bracket in affected areas.